Water heater



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T. A. M. STEVENSON WATER HEATER Filed Feb. 12, 1926 March 27, 1928.,

61H50: new

March 27, 192s. 1,664,330

' T. A. M. STEVENSGN WATER HEATER Filed Feb. 12. 1926v 2 Sheets-Sheet 2Patented Mar. 27, 1928.

UNITED STATES.

THOMAS A. M. STEVENSON, OIE WINSTON-SALEM, NORTH CAROLINA.

WATER HEATER.

Application filed February 12, 1926. Serial No. 87,890.

. My invention relates to water heaters, and more especially to thattype of water heater' wherein the water is heated by a gas burner usedin connection with a series of coils against which the gas flameprojects.

, Another object of my invention is to provide in a water heater aseries of coils for holding'and conducting the water to be heated, andalso toy provide a compartment surrounding the coils and the flame, inwhich compartment water will be held for heating, the'heat being thusconsumed in heating the water rather than being allowed to heat thecasing for the coils. l

' Another object of my invention is to provide a waterheater in whichlthe water will be passed through the ame several times vbefore being`allow-ed to leave the water heater.

Another object of. my invention is to pro- .vide afwater heater whichcan be easily drained in cold weather when there is danger of' freezing.y j v Having thus stated some of the yobjects of my invention, a briefdescription of the different figures in thev drawings will be given, .inwhich v F igurel is a vertical sectional view of my device;

Figure 2 is a cross-sectional view of the drain valve in open position;

Figure 3 is a cross-sectional View of the drain yvalve in closedposition;

Figure 4 is a view takenv along the line *1l-4f in Figure 3, v .y

- Figure 5 isa plan view of myV water heater; i f y 44j Figure 6 is across-sectional view taken along the line 6--6 in Figure 1;

Figure 7 is a cross-sectional View taken along the line 7 7 inFigure 1;v

Figure 8 is a cross-sectional l'View taken along the line 88 in Figure1; .Figure 9 is a cross-sectional view'taken along the line 9-9 inFigure 1.

vA brief description of the different figures in the drawings'havingbeen given, a detailed description of the drawings will Vnow ybe given,in which like reference characters .indicate corresponding partsthroughout the drawings. l

The numeral 10 indicates my water heater which has aV base 11 whichsupports the whole. heater; Secure-d tothe upper portion l ofthe base 11and to the inner surface thereof is the ring-shaped member 12 which hase `ceeds.

on its upper surface an inner ring 18 and an outer ring 14 integraltherewith. These rings are threaded on their inner faces.

' Threadably engaging the inner surface of the outer ring 14 is thepiece of tubing 15, which is preferably made of copper or brass, andthreadably engaging the inner surface of the inner ring 13 is the pieceof smaller tubing16, made of the same material as the tubing 15.

AThe upper ends of the pieces of tubingl and 16 have a similarring-shaped member 17 secured thereto by meansof threads in thesamemanner as that just describedfor the lower ends of the pieces oftubing. This ring-shaped member 17 has a central disk portion 17athaving a` cut-away portion 18 near the center thereof,the purpose ofwhich will be set forth as the'specification pro- ALocated within the-base portion 11 and secured to said' base portion is the burner 20which has av central'` `hollow portion through which the pipe 21passes.` This gas burner 20 connects to an air intake vportion 21 and toa gas pipe 22, which gas-pipe has a valve 23 therein. j v Y i The sourceof water supply is indicated by the numeral 25. This. pipe runs upwardover the top of theheater and through the hole 18 in the ring-shapedmember 17l land forms itself into arcoil 26, this beingfthe extendsIdownwardly until it reaches a point just above the funnel-shaped member27 lpoint 30, penetrating said tube 16 and com- `municates with therecess formed betweenl the two pieces of tubing `15 and 16.

The connection of the inner coil 28 to the 'inner tube 16 is madeeitherby soldering the pipe to the tube 16 or by a threaded connectionif desired. l Y,

At the lower portion of the inner tube16 a pipe 31 is joined thereto,the interior of the pipe 31 communicating with the space between thetubes 1'5 and 16. This connection may be madeV .bysoldering, brazing,

welding, or by a threaded connection as deouter coil in my water heater,The coil v26 lil() coils of piping, a source of heat located below theunnel-shaped member, and means in communication with all of the aboveparts for draining' the water therefrom.

' 4. In a water heater, two vertically disposed Cylindrical members ofdifferent radial dimensions secured to each other at their ends so as toleave a space therebetween, a funnel-shaped member capable of holdingwater under pressure located within the cylindrical members, adownwardly extending coil of piping located within the smaller cylinderand being; connected toa source of water supply at its upper end, anupwardly extending coil of piping connected to the lower portion of thefirst coil and having;` its upper end connected to and piercing the vthe other coil, downward thru the space between the cylinders, up thruthe funnelshaped member and thru the vertically dis# posed pipe, and outthru the top of the heater.

In witness that I claim the'foregoing as my own I have signed my name tothe specilication, this the 6th day of Feb., 1926.

THOMAS A. M. sTEvENsoN.

